Luther c



Patented Mar. 28, I899.

No. 622,l26.'

L. c. BBOWELL. BED AND GYLINDER PRINTING MACHINE.

a u cati n med Jux 15, 1599.

(No Model.)

m: Noam; PETERS c0. PHOTO-LIYHQ, WASNINGTON, u. c. v

llNiTE, STATES FFICEQ.

PATENT LUTHER C. CRONVELL, OF NEW YORK, N. Y., ASSIGNOR TO ROBERT HOE,THEODORE l-I. MEAD, AND CHARLES WV. CARPENTER, OE SAME PLACE.

BED-AND-CYLINDER PRINTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 622,126, dated March28, 1899. Application filed July 15, 1898. Serial No.- 686 003f (N0modeli) To all whom it may concern:

Be it known that I, LUTHER C. CROWELL, a citizen of the United States,residing at New York, county of Kings,and State of New York, haveinvented certain new and useful Improvements in Bed-and-CylinderPrinting- Machines, fully described and represented in the followingspecification and the accompanyin g drawings, forminga partof the same.

This invention relates to certain improvements in bed-and-cylinderprintin g-machines, and more particularly to that class of. machines inwhich a reciprocating bed cooperates with a cylinder which revolvescontinuously in the same direction. In this class of machines it isnecessary in order to effect registry and produce good results inprinting that the cylinder and bed move in exact synchronism during thatpart of the stroke of the bed in which the printing is accomplished. Itis usual, therefore, to drive thecylinder from the bed, as by arack-and-gear connection, during a considerable part of the movement ofthe bed, which of course produces exact correspondence in movementbetween the cylinder and the bed, and to cause the printing to be donewhile the cylinder is so driven. When the cylinder is disengaged fromthe bed, which disengagement may be effected in various ways, it isdriven by an auxiliary mechanism which takes the cylinder and revolvesit continuously in the same direction until it is again taken by thebed. The disengagement of 'the cylinder and bed and their reengagementmay be eiit'ected in various ways, though in machines of themultirevolution type it is usual to accomplish'it by raising andlowering the cylinder at appropriate times.

In machines of the character under consideration the mechanism whichdrives the bed, in order to make a machine which is efficient so. far asproduct is concerned, should be of such a character as to drive it at ahigh speed during so much of the stroke as is possible and yet act toslow it down, bring it to a full stop at the point of reverse, start iton its return stroke, and bring it again up to its full speed asexpeditiously as possible.

The peculiar movements which the bed re= quires can be effectively givento it bymean's of a crank mechanism or bymechanisms operated by orproducing a movement which is similar to that produced bya crankmechanism. The movement produced by a crank mechanism is, however, as iswell known, at no time constant, and the movement of the bed produced byit is of course at no time constant. The bed constantly increases inspeed from the point of reverse up to the middle of its stroke and thenconstantly decreases to the point of reverse at the other end of thestroke. If the cylinder and the bed remain in engagement during theentire or nearly the entire stroke of the bed and the crank-drivingmechanism, therefore, be compelled to drive at varying speeds not onlythe heavy bed through its entire stroke, but has imposed upon it theadditional task of driving a heavy cylinder, which also must move atvarying speeds, since it is driven through the bed and correspondsthereto in its movement, the strain produced upon the driving mechanismis excessive and causes great wear and tear upon the machine. While,therefore, it is very desirable in order to produce the necessary exactregister to drive the cylinder from the bed during the printingoperation, it is also desirable to relieve the bed and the crankmechanism which drives it from the necessity of driving the cylinderexcept dur- ..-ing the printing operation-that is, the cylinder shouldbe disengaged from the bed as soon as possible after the-completion ofthe printing operation and held out ofengagement therewith until theprinting operation is to again begin, when the bed and cylinder shouldagain be brought into engagement. The crank driving mechanism is thusonly required to drive the cylinder during a small part of the completereciprocation of the bed and at the time when there is the leastvariation in movement due to the characteristics of the said crankmechanism. To produce an effective machine, however, it is necessarythat the cylinder and bed be enabled to engage and disengage at highspeeds and to accomplish this without shock or jar,

. which, especially in high-speed mechanisms,

would be very injurious to the entire machine. To eifect this result, itis of course obvious that the cylinder must be caused to move, when itreengages the bed, at a rate of speed which corresponds exactly to thatwhich the bed has at that time.

IIeretofore it has been considered impractical to disengage a cylinderwhich revolves continuously in the same direction from the bed and causeit to reengage with the bed at high speeds, because of the resultingshock or jar, which, as has been before said, is exceedingly injuriousto the machine. Ithas been necessary, therefore, to maintain thecylinder in engagement with the bed during a much longer period of timethan was necessary to accomplish the printing. In fact, the bed andcylinder in machines in which the cylinder revolves continuously in thesame direction have remained in cngagem ent until the bed waspractically at the end of its stroke, at which time disengagement andreengagementpresented little difficulty. This long engagement of the bedand cylinder has resulted in causing a great strain upon the drivingmechanism, which is compelled not only to drive both the bed andcylinder during the printing operation, when the speed is more nearlyconstant than at other times, but also during the periods when the speedof these parts must be constantly increased and diminished, and has alsoresulted in limiting to a very considerable degree the speed at whichthe machine was run.

It is the object of this invention to produce a printing-machineembodying a cylinder continuously revolving in the same direction and areciprocating bed in which'the bed may be operated by a crank mechanismor other similar mechanism operating at varying speeds and in which thecylinder is driven'in synchronism with the bed only during substantiallythe printing operation and thereafter by an auxiliary mechanism whichmaintains the cylinder after its disengagement from the bed at aconstant speed which is equal to the speed it had when it was disengagedfrom the bed until it again reengages with the bed and to accomplishthis transfer from one driving mechanism to the other at high speeds andby means of intermediate devices which enable the transferring operationto be effected without shock or jar or any injurious st'rain upon themachine.

lVith these and other objects in view the invention consists in certainconstructions, parts, improvements, and combinations, as will behereinafter described and more fully pointed out in the claims hereuntoappended.

In the accompanying drawings, which constitute apart of thisspecification and in which like letters and figures of referenceindicate the same parts, Figure 1 represents in side elevation so muchof one of the several types of bed-and-cylinder printing-machinesembodying my invention as is necessary to enable the invention to beclearly understood.- Figs. 2

and 3 are detail views illustrating the action of the intermediatedevices by means of which the cylinder is secured to and released fromthe constant-speed mechanism.

In this embodiment of the invention the frame of the machine, which ismarked A, is diagrammatically illustrated by dotted lines. The bed ispreferably directly reciprocatcd by a mechanism ordinarily known in theart as a railroad-gear}? the said gear being marked 13 and engagingracks O and D, respectively, mounted on the bed and the frame of themachine. The said' railroad-gear is operated by a crank-arm E, (shown indotted lines in Fig. 1,) mounted on the shaft F. The crank-arm E and therailroad-gear before referred to are connected by means of the ordinaryyoked connecting-rod, (herein shown in dotted lines and marked 15'.) Theshaft F also carries a power-wheel or large gear G, through which poweris transmitted to the shaft in any usual manner. \Vhile thisconstruction affords a convenient and effective means for reciprocatingthe bed, it is to be understood that the invention is not to beconsidered as in any way limited thereto, as many other forms ofvariable-speed mechanism might be used for this purpose The bed, whichreciprocatcs in the usual Ways, is provided with a rack which engages atsuitable times with a cylinder N, suitably secured to thecylinder-shaft, the said shaft being marked I and the cylinder thereonbeing marked II.

I11 the type of machine shown the cylindershaft I is journaled insuitable sliding boxes of a usual construction, which are mounted instandards K on the frame of the machine. The cylinder-gear N is engagedwith and disengaged from the rack N on the bed by means of suitableraising and lowering mechanism of an ordinary type. Such raising andlowering mechanism is in the interest of clearness indicated in dottedlines in Fig. 1. It consists of rods 1, connected to a cross-bar 2, saidcross-bar 2 being lowered by toggles 3 and the cylinder and cross-barbeing raised by the usualsprings. (NOlJSllOWlL) Thetoggles are made andbroken by a link 4, which is operated from a pivoted lever 5, said leverbeing controlled in its movements by a cam on the shaft F.

The large gear or power wheel G, before referred to, engages with asuitably-mounted intermediate G, which in turn meshes with a gear L,loosely mounted on the cylindershaft I, before referred to. As the gearG runs at a constant speed, it will be understood that the train ofgearing just referred to will also be continuously operating at aconstant speed, which speed is less than the highest speed which the bedhas under the influence of the crank mechanism and is of course greaterthan its lowest speed. While this train of gearing forms an eflicientconstant-speed mechanism, it is to be understood that any othermechanism which would form a constant-speed device might be used, as theinvention is by no means limited to any particular means for producingconstant speed.

The gear L has a boss or hub L extending inwardly therefrom, which bossor hub is provided with a suitable feather or feathers L Sliding on thehub or boss L and connected thereto by the feathers L before referredto, is a member M of a sliding clutch which forms a part of anintermediate mechanism by which the cylinder when it is disconnectedfrom the bed is connected to the constant-speed gearing before referredto. This member M is provided with a grooved collar M, which is engagedby pins N, mounted on the arms N of a yoke which constitutes one of thearms of a bell-crank lever. This bell-crank lever is preferably pivotedon a pivot N supported in any suitable manner. It is herein shown assupported on a bracket N mounted on the frame of the machine. The otherarm, N of the bell-crank lever (clearly shown in dotted lines in Fig. 3)is connected by a rod or bar 0 to one of the armsp of a three-armedlever P, which is suitably mounted on the frame of the machine. Thethree-armed lever P is pivoted at P and has one of its arms, as 1),bearing upon a suitable spring S, which is compressed by the movement ofthe lever, hereinafter to be described. The other arm,

0 p of the lever P is connected to a sliding bar R, which is preferablyformed with a yoke R, which yoke embraces the shaft F of the large gearG. The sliding bar carries a stud R which stud bears upon and isoperated by a suitable cam T and also mounted on the shaft F, beforereferred to. The cam and the connected devices automatically operate atthe desired times to shift the clutch member M and lock the cylinder toand disengage it from the constant-speed mechanism, as will bedescribed.

The clutch member M, before referred to, is provided with a plate Mwhich carries a series of pins 1. These pins are preferably four innumber, although the number of pins may be varied as desired. The gear Nis provided with a series of sockets 2, corresponding in number to thenumber of the pins 1.

The construction being as above described, the operation is as follows,reference being had to Fig. 1: Power being applied to the gear orpowerwheel Gin any suitable manner, as bya driving-pinion, (not shown,)it is caused to revolve. The crank E will be revolved and the bed willbe reciprocated through the railroad-gear in an obvious manner. At thesame time the intermediate G will be revolved, and as the clutch memberM has been shifted so that the pins 1 are engaging the sockets orrecesses 2 in the cylinder-gear N G the cylinder will be under thecontrol of and be revolved by the constant-speed gearin The speed of thebed under theinfluence of the crank driving mechanism will increase asthe crank is moving from its position on the center, as shown in Fig. 1,toward the position in which it will stand in a vertical line passingthrough the axis of the shaft F, at which time its speed and the speedof the bed will have reached the maximum. When or shortly before the bedunder the influence of the increasing speed of the crank attains thespeed which the cylinder has under the control of the constantspeedmechanism or gearing (which will be at about the time the crank hascompleted, say, one-eighth of a revolution,)the raising andloweringmechanism will be operated to lower the cylinder and bring the gear Ninto position to be engaged by the rack N At about this time the lowpart of the cam T comes opposite the stud R and the spring S willoperate to throw the threearmed lever, rock the bell-crank N, and causethe clutch member M to slide on the hub L of the gear L, therebywithdrawing the pins 1 from the recesses 2, and thus disconnecting thecylinder from the constant-speed mechanism. The cylinder is now whollyunder the control of and is operated by the bed, and exact synchronismof movement between the two being thus secured the printing operationtakes place. After the crank passes the vertical line referred to in thepreceding paragraph its speed and the speed of the bed will begin todecrease. When the speed of the bed and the cylinder (which is then, ashas been before said, entirely under its control) has decreased underthe influenceof the crank mechanism until it again coincides with thespeed of the constantspeed mechanism, which will be at about the timethat the crank has moved one-eighth of a revolution from the verticalline referred to, by which time the printing operation has beenconcluded, the raising and lowering mechanism operates to raise thecylinder and disengage the gear N from the rackrN At the same time thecam T operates upon the stud R of the sliding bar R and rocks thethree-arm ed lever P against the tension of the spring S. This movementof the three-armed lever through the connectingrod 0 rocks thebell-crank N, causes the member M to slide upon the hub L of the gear L,and brings the pins 1 into engagement with the recesses 2, therebylockin g the cylinder to the gear L, it being remembered that the memberM is connected to the hub of the gear L by splines or feathers L Thecylinder is now locked to the constant-speed mechanism and will becontinuously revolved by it at a constant speed. The bed, which is nowdisengaged from the cylinder, continues on with a constantly-decreasingspeed to its point of reverse, reverses, makes its return stroke, andagain reverses. As it reaches the point where its speed coincides withthat of the constant-speed mechanism and the printing operation is toagain take place the raising and lowering mechanism is operated to lowerthe cylinder, and the low part of the cam T, coming opposite the studRhpermits the spring S to rock the three-armed lever and disengage thepins 1 of the member M from the sockets 2 in the cylinder-gear. Thecylinder is now again disengaged from the constant-speed mechanism, iswholly under the control of the bed, and therefore is and will beoperated exactly in synchronism with the bed, and this operation willcontinue until the printing operation is completed, at which time theengaging and disengaging operations are repeated.

For the sake of convenience in illustration the invention has been shownas embodied in a continuous-revolution press of the threerevolutiontypewherein the cylinder is connected with and disconnected from the bed bymeans of a raising and lowering mechanism. It is to be understood,however, that the invention is by no means limited to a machine of thisdescription, but is applicable to and may be used with any type ofbed-and-cylinder press employing a cylinder which rotates continuouslyin the same direction and operates in connection with a reciprocatingbed, and this whether the cylinder and bed be connected or disconnectedby means of a raising and lowering mechanism or any other device.

It is to be understood that while the clutch described is a convenientand effective form of intermediate connection. by which the cylinder isconnected to and disconnected from the constant-speed mechanism theinvention is by no means limited to this or any particular form I ofclutch. Any device which is auxiliary to the constant-speed mechanism,which is intermediate the cylinder and the constant-speed mechanism, andwhich will operate to connect the cylinder to and disconnect it from theconstant-speed mechan ism falls within this invention.

In general it is to be understood that this invention is not limited inits scope or application to the specific details of construction whichhave been described in the foregoing specification. The constructiondescribed is an eifective one for carrying out the desired operation;but many changes may be made therein and many other constructionssubstituted for those described without departing from the spirit orscope of the invention, which is generic in its nature.

Vhat I claim is 1. In a bed-and-cylinder printing-machine thecombination with a reciprocating bed, of means for driving it at varyingspeeds, a cylinder continuously rotating in the same direction, meansfor driving the cylinder in synchronism with the bed during a part ofone stroke, a constant-speed mechanism for driv-.

ing the cylinder when it is not driven in synchronism with the bed,auxiliary intermediate devices between the constant-speed mechanism andthe cylinder, said devices being operable to connect the cylinder to anddisconnect it from the constant-speed mechanism at substantially thetimes when the two speeds coincide, substantially as described.

2. In a bed-and-cylinder printing-machine, the combination with areciprocating bed and a constantly-rotating cylinder of means fordriving the bed at varying speeds, means for driving the cylinder insynchronism with the bed during substantially the printing period, meansfor driving the cylinder during the nonprinting period at a constantspeed which is approximately equal to the printing speed, and auxiliarydevices intermediate the cylinder and the constant-speed mechanismwhereby the cylinder may be connected to and disconnected from saidmechanism.

3. The combination with a reciprocating bed driven at varying speeds, ofa cylinder continuously rotating in the same direction, said cylinderbeing driven by the bed during substantially the printing operation,said cylinder and bed being disconnected during substantiall y thenon-printing period of the m ovement of the bed, mechanism for rotatingthe cylinder at a constant speed which is approximately equal to thespeed given it by the bed at the beginning and end of the printingoperation, and auxiliary devices acting at substantially the times whenthe two speeds coincide, for connecting the cylinder to one drivingmechanism and disconnecting it from the other.

4. The combination with a reciprocating bed driven at varying speeds, ofa cylinder continuously rotating in the same direction, said cylinderbeing driven by the bed during the printing operation and held by thebed against movement in either direction independently of the bed duringsaid operation, mechanism for rotating the cylinder at a constant speedduring the non-printing period and auxiliary means intermediate thecylinder and the constant-speed mechanism for connecting the cylinder toand disconnecting it from said mechanism, substantially as and for thepurpose described.

5. The combination with a reciprocating bed, of a crank mechanism fordriving the bed at varying speeds, a continuously-rotating cylinderdriven from the bed during the printing operation and disconnectedtherefrom during the rest of its movements, said bed and cylinder beingarranged with the printing operation occurring during that part of themovement of the bed in which the speed varies but slightly, aconstant-speed mechanism for rotating the cylinder when disconnectedfrom the bed, the cylinder being transferred from the bed to theconstant-speed mechanism at substantially the times when the two speedscoincide, and raising and lowering devices.

6. In a bed-and-cylinder printing-machine, the combination with areciprocating bed, of means for driving it at varying speeds, a cylindercontinuously rotating in the same direction, means for driving thecylinder in synchronism with the bed during a part of one stroke, aconstant-speed mechanism for driving the cylinder when it is not drivenin synchronism with the bed, auxiliary intermediate devices between theconstant-speed mechanism and the cylinder, and mechanism for operatingthe intermediate devices to connect the cylinder to and disconnect itfrom the constant-speed mechanism at substantially the times when thetwo speeds coincide, substantially as described.

7. In a bed-and-cylinderprinting-machine the combination with areciprocating bed, of means for driving it at varying speeds, a cylindercontinuously rotating in the same direction, means for driving thecylinder from the bed during a part of one stroke, a constant-speedmechanism for driving the cylinder when it is not driven by the bed,auxiliary intermediate devices between the constant-speed mechanism andthe cylinder, said devices being operable to connect the cylinder to anddisconnect it from the-constantspeed mechanism at substantially thetimes when the two speeds coincide, substantially as described. I

8. In a bed-and-cylinder printing-machine, the combination with areciprocating bed, of means for driving it at varying speeds, a cylindercontinuously rotating in the same direction, means for driving thecylinder from the bed during a part of one stroke, a constant-speedmechanism for driving the cylinder when it is not driven by the bed,auxiliary intermediate devices between the constan t-speed mechanism andthe cylinder, and

mechanism for operating the intermediate devices to connect the cylinderto and disconnect it from the constant-speed mechanism at substantiallythe times when the two speeds coincide, substantially as described.

9. In a bed-and-cylinder printing-machine, the combination with areciprocating bed, of means for driving it at varying speeds, a cylindercontinuously rotating in the same direction, means for driving thecylinder from the bed during a part of one stroke, a constant-speedmechanism for driving the cylinder when it is not driven by the bed,raising and lowering mechanism for connecting the cylinder to anddisconnecting it from the bed,

intermediate devices between the constant.

speed mechanism and the cylinder, and automatic mechanism for operatingthe intermediate devices to connect the cylinder to and disconnect itfrom the constant-speed mechanism while the bed is running at aconsiderable speed and before it reaches the end of its stroke,substantially as described.

10. Inabed-and-cylinder printing-machine, means whereby the bed isdriven at varying speeds, means whereby the cylinder is driven insynchronismw' h the bed during a part of one stroke, mechanism fordriving the cylinder at constant speed when it is not driven insynchronism with the bed, and a clutch mechanism acting to connect thecylinder to and disconnect it from the constant-speed mechanism atsubstantially the times when the speeds of the bed and constant-speedmechanism coincide, substantially as described.

11. In abed-and-cylinderprinting-machine, means whereby the bed isdriven at varying speeds, means whereby the cylinder is driven insynchronism with the bed during a part of one stroke, mechanismfordriving the cylinder at a constant speed which is substan: tiallyequalto the printing speed when it is not driven in synchronism with thebed, and a clutch mechanism acting to connect the cylinder to anddisconnect it from the constant-speed mechanism at substantially thetimes when the speeds of the bed and constant-speed mechanism coincide,substantially as described.

12. In a bed-and-cylinder machine,a powerwheel rotating at a constantspeed, mechanism whereby the bed is driven from said wheel at varyingspeeds, means whereby the cylinder is driven in synchronism with the bedduring a part of its stroke, mechanism operated from the power-wheel fordriving the cylinder at a constant speed, and a clutch mechanism actingto connect the cylinder to and disconnect it from the constant-speedmechanism at substantially the times when the speeds of the bed and theconstant-speed mechanism coincide.

13. In abed-and-cylinder machine, a powerwheel rotating at aconstantspeed, mechanism whereby the bed is driven from said wheel atvarying speeds, means whereby the cylinder is driven in synchronism withthe bed during a part of its stroke, mechanism operated from thepower-wheel for driving the cylinder at a constant speed, which issubstantially equal to the printing speed, and a clutch mechanism actingto connect the cylinder to and disconnect it from the constant-speedmechanism at substantially the times when the speeds of the bed and theconstant-speed mechanism coincide.

14. In a bed-and-cylinder machine, mech anism whereby the bed is drivenat varying speeds, means whereby the cylinder is driven by the bedduring a part of its stroke, mech anism for driving the cylinder at aconstant speed when it is not driven by the bed, and a clutch mechanismacting to connect the cylinder to and disconnect it from theconstantspeed mechanism at substantially the times when the speeds ofthe bed and the constantspeed mechanism coincide.

15. In a bed-and-cylinder machine, mechanism whereby the bed is drivenat varying speeds, means whereby the cylinder is driven by the bedduring a part of its stroke, mechanism for driving the cylinder at aconstant speed which is substantially equal to the printing speed, whenit is not driven by the bed, and a clutch mechanism acting to con- 'nectthe cylinder to and disconnect it from the constant-speed mechanism atsubstantially the times when the speeds of the bed and theconstant-speed mechanism coincide.

16. In a bed-and-cylinder machine, mech anism whereby the bed is drivenat varying speeds, means whereby the cylinder is driven by the bedduring a part of its stroke, a constant-speed mechanism for driving thecylin- IOC der when it is not driven by the bed, a clutch mechanismacting to connect the cylinder to and disconnect it from theconstant-speed mechanism at substantially the times when the speeds ofthe bed and of the constantspeed mechanism coincide, and raising andlowering devices for connecting the cylinder to and disconnecting itfrom the bed, substantially as described.

17. The combination with thereciprocating bed driven at varying speedsand carrying a rack, of a cylinder continuously rotating in the samedirection and carrying a gear engaging said rack during a part of themovement of the bed, mechanism for rotating the cylinder independentlyof the bed and at a constant speed when the gear is out of engagementwith the rack, and auxiliary devices intermediate the cylinder and theconstant-speed mechanism acting to connect the cylinder to anddisconnect it from the constant-speed mechanism at substantially thetimes when the speeds of the bed and constant-speed mechanism coincide.

1S. Inabed-and-cylindermachine,thecombination with mechanism whereby thebed is driven at varying speeds, of a rack on the bed meshing with agear on the cylinder for driving the cylinder during a part of onestroke of the bed, gearing rotating at constant speed for driving thecylinder when it is not driven by the bed, devices for raising andlowering the cylinder to move its gear into and out of mesh with therack on the bed, and a suitable clutch mechanism acting to connect thecylinder to and disconnect it from the constant-speed mechanism atsubstantially the times when the speeds of the bed and constant-speedmechanism coincide.

19. Inabed-and-cylinder machine,thecon1- bination with a power-wheel, ofa crank mechanism operated by the wheel for driving the bed mechanismwhereby the cylinder is driven by the bed during a part of its stroke,gearing operated from the power-wheel at a constant speed for drivingthe cylinder when it is not driven by the bed, and a clutch mechanismacting to connect the cylinder to and disconnect it from theconstant-speed gearing at substantially the times when the speeds of thebed and said gearing coincide.

20. The combination with a reciprocating bed, of means fordriving it atvarying speeds, a cylinder continuously rotating in the same direction,means whereby the cylinder is driven in synchronism with the bed duringa part of one stroke, a constant-speed mechanism for driving thecylinder when it is not driven in synchronism with the bed, a clutchmechanism between the constant-speed mechanism and the cylinder, saidclutch mechanism acting to connect the cylinder to and disconnect itfrom the constant-speed mechanism while the bed is running at aconsiderable speed and before it reaches the end of its stroke,substantially as described.

21. The combination with a reciprocating bed, of means for driving it atvarying speeds, a cylinder continuously rotating in the same direction,means whereby the cylinder is driven in synchronism with the bed duringapart of one stroke, a const-an t-speed mechanism for driving thecylinder when it is not driven in synchronism with the bed, a clutchmechanism, automatic devices operating to actuate the clutch mechanismto connect the cylinder to and disconnect it from the constant-speedmechanism while the bed is running at a considerable speed and before itreaches the end of its stroke, substantially as described.

22. In abed-and cylinder machine,the combination with a reciprocatingbed, of a powerwheel rotating at a constant speed, mechanism whereby thebed is driven from said wheel at varying speeds, a cylinder continuouslyrotating in the sam c direction, means whereby the cylinder is driven insynchronism with the bed during a part of one stroke, a constant-speedmechanism operated from the power-wheel for driving the cylinder when itis not driven in synchronism with the bed, and a clutch mechanism actingto connect the cylinder to and disconnect it from the constant-speedmechanism at substantially the times when the speeds of the bed andconstantspeed mechanism coincide, substantially as described.

23. In abed-and-cylinder machine,the combination with a reciprocatingbed, of mechanism whereby the bed is driven at varying speeds, acylinder continuously rotating in the same direction, means whereby thecylinder is driven by the bed during a part of one stroke, aconstant-speed mechanism for driving the cylinder when it is not drivenby the bed, and a clutch mechanism acting to connect the cylinder to anddisconnect it from the constant-speed mechanism at substantially thetimes when the speeds of the bed and constant-speed mechanism coincide,substantially as described.

24:. In a bed-and-cylinder machine, mechanism whereby the bed is drivenat varying speeds, means whereby the cylinder is driven by the bedduring a part of one stroke, a constant-speed mechanism for driving thecylinder when it is not driven by the bed, a clutch mechanism forconnecting the cylinder to and disconnecting it from the constantspeedmechanism while the bed is running at considerable speed and before itreaches the end of its stroke, and raising and lowering devices forconnecting the cylinder to and disconnectingit from the bed,substantially as described.

25. Inabed-and-cylindermacl1ine,thecombination with a reciprocating bed,of a powerwheel running at a constant speed, mechanism whereby the bedis driven from said wheel at varying speeds, a cylinder continuouslyrotating in the same direction, means whereby the cylinder is driven bythe bed during a part of one stroke, mechanism operated from thepower-wheel for driving the cylinder at a constant speed when it is notdriven by the bed, and devices including a clutch acting atsubstantially the times when the speeds of the bed and the constantspeedmechanism coincide for connecting; the cylinder to and disconnecting itfrom. the constantspeed mechanism, substantially as described.

26. Inabed-and-cylindermachine,thecombination with mechanism whereby thebed is driven at varying speeds, of a rack on the bed meshing with agear on the cylinder for driving the cylinder during a part of onestroke of the bed, gearing rotating at a constant speed for driving thecylinder when it is not driven by the bed. devices for raising andlowering the cylinder to move its gear into and out of mesh with therack on the bed, and a suitable clutch mechanism for connecting thecylinder to the constant-speed gearing while the bed is running atconsiderable speed and before it reaches the end of its stroke,substantially as described.

27. Inabed-and-cylindermachine,thecombination with a reciprocating bed,of a powerwheel, crank mechanism -operated by the wheel for driving thebed, a cylinder continuously rotating in the same direction, mechanismwhereby the cylinder is driven by the bed during apart of one stroke,gearing 0perated from the power-wheel at a constant speed for drivingthe cylinder when it is not driven by the bed, and a clutch mechanismacting at substantially the times when the speeds of the bed andconstant-speed mechanism coincide for connecting the cylinder to anddisconnecting it from said gearing, substantially as described.

28. In a bed-and-cylinder machine,the combination with a gear-Wheel, ofa crank-stud mounted on the wheel and suitable connections whereby thecrank-stud is caused to drive the bed, means whereby the cylinder isdriven by the bed during a part of one stroke, a suitable mechanism forraising and lowering the cylinder, a train of gearing connected with theabove-named gear, and a suitable clutch mechanism for connecting thecylinder to the gearing when it is disconnected from the bed while thebed is running at considerable speed and before it reaches the end ofits stroke, substantially as described.

29. The combination with a bed, of a crank mechanism for driving it, acylinder, means whereby the cylinder is driven from the bed during apart of one stroke, a constant-speed mechanism having a speed which isconsiderably greater than the least speed of the bed and less than itsgreatest speed, a sliding clutch intermediate the cylinder and theconstant-speed mechanism, and means for operating the said clutch toconnect the cylinder to and disconnect it from the constant-speedmechanism, substantially as-described.

30. The combination with a bed, of a crank mechanism for driving it, acylinder, means whereby the cylinder is driven 'from the bed during apart of one stroke, a constant-speed mechanism having a speed which isconsiderably greater than the least speed of the bed and less than itsgreatest speed, a sliding clutch intermediate the cylinder and theconstant-speed mechanism, and automatic means for operating the saidclutch to connect the cylinder to and disconnect it from theconstant-speed mechanism when the speed of the cylinder under theinfluence of the bed is equal to that of the constant-speed mechanism,substantially as described.

31. The combination with a reciprocating bed, of a crank mechanism fordriving it, a cylinder continuously rotating in the same direction,means for driving the cylinderfrom the bed during a part of one stroke,raising and lowering devices operating to connect the cylinder with anddisconnect it from the bed, a constant-speed mechanism having a speedwhich is considerably greater than the least speed of the bed and lessthan its greatest speed, a sliding clutch, and means for operating theclutch to connect the cylinder to and disconnect it from theconstant-speed mechanism when the speed of the cylinder under theinfluence of the bed is equal to the speed of the constant-speedmechanism, substantially as described.

32. The combination with a reciprocating bed, of a crank mechanism fordriving it, a cylinder, means for driving the cylinder from thebedduring a part of one stroke, a constant-speed mechanism, a slidingclutch intermediate the cylinder and the constantspeed mechanism, abell-crank for operating the clutch, a cam, and devices intermediate thecam and the bell-crank whereby the cam 'is caused to operate thebell-crank and slide the clutch, substantially as described.

33. The combination with a bed, of a crank mechanism for driving it, acylinder,means for driving it from the bed during a part of one stroke,aconstantlyrunning gear mounted on the cylinder-shaft, a clutch memberslidingly mounted on and connected to the hub of the gear,cylinder-engaging devices carried by the clutch member, and suitablemeans for 0pcrating the clutch, substantially as described.

34. The combination with a bed, of a crank mechanism for driving it, acylinder, means whereby the cylinder is driven from the bed during apart of one stroke, raising and lowering devices operating to connectthe cylinder to and disconnect it from the bed, a constantly-runninggear mounted on the cylin der-shaft, a clutch member slidingly mountedon and connected to the hub of the gear, cylinder-engaging devicescarried by the clutch member, and suitable means for operating theclutch,substantially as described.

35. The combination with a bed, of a crank mechanism for driving it,acylinder,means for driving the cylinder from the bed during a part ofone stroke, a constantly-running gear, a clutch member having a slidingconnection with the hub of the gear, a series of pins-0n I my hand inthe presence of two subscribing the clutch member, a series of recessesin the witnesses. cylinder, and devices operating to slide the I UTHER CCROWET T clutch to cause its pins to en gage the recesses 5 in thecylinder when the cylinderis disengaged Witnesses:

from the bed, substantially as described. I J AMES Q. RICE, In testimonywhereof I have hereunto set E T. F. KEHOE.

